Alert archive / Minnesota / Mesoscale Discussions in 2005

Mesoscale Discussion 1907

July 31, 2005Beltrami County, Koochiching County, Lake of the Woods County, Minnesota

The Storm Prediction Center issued this mesoscale discussion at Jul 31, 2005, 3:46 AM CDT for Beltrami County, Koochiching County, Lake of the Woods County, Minnesota. It was in force for 59 min.

The area

The outline as issued.

The facts

Issued
Jul 31, 2005, 3:46 AM CDT (08:46 UTC)
Expired
Jul 31, 2005, 4:45 AM CDT
In force
59 min
Issued by
the Storm Prediction Center

Counties Beltrami County, MN, Koochiching County, MN, Lake of the Woods County, MN

The radar

The Duluth radar (KDLH), 241 km from the middle of the area, began a volume at 08:46 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 8.8 hours before the alert went out and 74 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, International Fa, MN at 00:00Z on 2005-07-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2417 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, International Fa, MN at 00:00Z on 2005-07-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 143 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
2417 J/kg
Mixed-layer CIN
-46 J/kg
Mixed-layer LCL
1231 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
143 m²/s²
0-3 km storm-relative helicity
192 m²/s²
Significant tornado parameter
1.8
Supercell composite
10.5

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 31, 1:12 AM CDTMesoscale DiscussionSPCBeltrami, Kittson, Koochiching, Lake of the Woods, Marshall, Pennington and 1 more93 min
Jul 31, 1:30 AM CDTSevere Thunderstorm WatchSPCBeltrami, Koochiching, Lake of the Woods3 hr

Nearby

Mesoscale Discussions in Minnesota, 2005Every mesoscale discussion in 2005

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.